A leaf is the principal lateral appendage of the stem which is in turn part of a plant. Hence a leave is an organ of a vascular plant. The shoot is formed together by the stem and the leaves. Foliage is a term used for referring leaves collectively. As is one must have often heard, 'autumn foliage'. The characteristic of this plant organ is that it is a dorsoventrally flattened organ, usually borne above the ground, and specialised for its function of photosynthesis. Photosynthesis is the process of converting the intake of carbon dioxide into oxygen. The primary photosynthesis tissue, in most leaves, known as palisade mesophyll, is located on the upper side of the blade or lamina of the leaf. However there are still exceptions, like in some species, including the mature foliage of Eucalypts, palisade mesophyll is present on both sides and these leaves are said to be isobilateral.
Many leaves have a distinct upper surface, also known as adaxial and distinct lower surface called abaxial which differ in colour, the number of stomata ( stomata are the pores present on leaves that intake and output gases), hairiness, the amount and structure of epicuticular wax and other features. When talking about the colour of leaves, they are mostly green, but there are always exceptions.

In this sub category you can download free PNG images: Leaf Nature. In this category "Leaf" we have 290 free PNG images with transparent background.

  • Falling Leaf Image Free Clipart HD PNG Image
    Falling Leaf Image Free Clipart HD
    Format: PNG
    Resolution: 1920x1080
    Size: 1.4MB
    Downloads: 244
  • Falling Petals Picture Download HQ PNG PNG Image
    Falling Petals Picture Download HQ PNG
    Format: PNG
    Resolution: 1920x1080
    Size: 560.2KB
    Downloads: 206
  • Colored Dandelion Photos PNG Download Free PNG Image
    Colored Dandelion Photos PNG Download Free
    Format: PNG
    Resolution: 650x1011
    Size: 449.2KB
    Downloads: 234
  • Ice Cube Photos Free Download PNG HD PNG Image
    Ice Cube Photos Free Download PNG HD
    Format: PNG
    Resolution: 612x612
    Size: 289.2KB
    Downloads: 579
  • Growing Plant Image Free Download Image PNG Image
    Growing Plant Image Free Download Image
    Format: PNG
    Resolution: 1614x820
    Size: 393.7KB
    Downloads: 204
  • Soap Bubbles HD Download HD PNG PNG Image
    Soap Bubbles HD Download HD PNG
    Format: PNG
    Resolution: 500x500
    Size: 78.5KB
    Downloads: 191
  • Ice Cube Free Download PNG HD PNG Image
    Ice Cube Free Download PNG HD
    Format: PNG
    Resolution: 1920x1080
    Size: 1.1MB
    Downloads: 280
  • Ice Cube Download Free Image PNG Image
    Ice Cube Download Free Image
    Format: PNG
    Resolution: 1073x360
    Size: 618.3KB
    Downloads: 241
  • Ground Free HQ Image PNG Image
    Ground Free HQ Image
    Format: PNG
    Resolution: 979x816
    Size: 666.4KB
    Downloads: 249
  • Green Energy Download Free Clipart HQ PNG Image
    Green Energy Download Free Clipart HQ
    Format: PNG
    Resolution: 500x500
    Size: 86.1KB
    Downloads: 198
  • Soap Bubbles Free Transparent Image HD PNG Image
    Soap Bubbles Free Transparent Image HD
    Format: PNG
    Resolution: 484x350
    Size: 134.5KB
    Downloads: 492
  • Growing Plant Download Free Clipart HD PNG Image
    Growing Plant Download Free Clipart HD
    Format: PNG
    Resolution: 600x574
    Size: 128.5KB
    Downloads: 229
  • Growing Plant Free Download Image PNG Image
    Growing Plant Free Download Image
    Format: PNG
    Resolution: 512x512
    Size: 9.2KB
    Downloads: 194
  • Grape Vine Leaf Art Free Download Image PNG Image
    Grape Vine Leaf Art Free Download Image
    Format: PNG
    Resolution: 665x750
    Size: 89.6KB
    Downloads: 96
  • Pic Grape Vine Leaf Art PNG Image
    Pic Grape Vine Leaf Art
    Format: PNG
    Resolution: 1000x960
    Size: 117.8KB
    Downloads: 78
  • Japanese Flowering Cherry Download Free Clipart HD PNG Image
    Japanese Flowering Cherry Download Free Clipart HD
    Format: PNG
    Resolution: 660x660
    Size: 288.9KB
    Downloads: 228
  • Bin Associate Symbol Recycling Recycle Waste Electronic PNG Image
    Bin Associate Symbol Recycling Recycle Waste Electronic
    Format: PNG
    Resolution: 800x800
    Size: 60.2KB
    Downloads: 234
  • Dandelion Free Download PNG HQ PNG Image
    Dandelion Free Download PNG HQ
    Format: PNG
    Resolution: 600x600
    Size: 71.8KB
    Downloads: 292
  • Green Leaf Picture PNG Download Free PNG Image
    Green Leaf Picture PNG Download Free
    Format: PNG
    Resolution: 1280x439
    Size: 465.9KB
    Downloads: 280
  • Gardening Free Transparent Image HQ PNG Image
    Gardening Free Transparent Image HQ
    Format: PNG
    Resolution: 512x512
    Size: 17.3KB
    Downloads: 192

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